RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception handler (SEH) chain corruption. Attackers can craft a malicious input string with 268 bytes of padding followed by SEH overwrite values and paste it into the Port field to cause denial of service.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Crun Realterm
cpe:2.3:a:crun:realterm:2.0.0.70:*:*:*:*:*:*:*
|
— | — |
References 4
https://realterm.sourceforge.io/
disclosure@vulncheck.com
https://sourceforge.net/projects/realterm/files/
disclosure@vulncheck.com
https://www.exploit-db.com/exploits/46391
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/realterm-serial-terminal-seh-overflow-crash
disclosure@vulncheck.com